PD-1 antibody
A humanized agonistic antibody which binds human PD-1 comprising a heavy chain wherein the variable domain of the heavy chain comprises the sequence given in SEQ ID NO:1 for CDR-H1, the sequence given in SEQ ID NO: 2 for CDR-H2 and the sequence given in SEQ ID NO: 3 for CDR-H3 and the heavy chain framework region is derived from human sub-group sequence VH4 3-1 4-30.4+JH4 (SEQ ID NO: 33). The disclosure also extends to therapeutic uses of the antibody molecules, compositions and methods for producing said antibody molecules.
1. A humanised agonistic antibody which binds human PD-1 comprising a heavy chain wherein the variable domain of the heavy chain comprises the sequence given in SEQ ID NO:1 for CDR-H1, the sequence given in SEQ ID NO:2 for CDR-H2 and the sequence given in SEQ ID NO:3 for CDR-H3 and the heavy chain framework region is human sub-group sequence VH4 3-1 4-30.4+JH4 (SEQ ID NO: 33) or a derivative thereof wherein up to four residues are changed.
2. A humanised antibody according to claim 1 wherein the residue at at least one of positions 25, 44, 48 and 71 of the variable domain of the heavy chain, as numbered according to Kabat, is a donor residue.
3. A humanised antibody according to claim 2 having the heavy chain variable domain sequence given in SEQ ID NO:23.
4. The antibody of claim 1 further comprising a light chain wherein the variable domain of the light chain comprises the sequence given in SEQ ID NO:4 for CDR-L1, the sequence given in SEQ ID NO:5 for CDR-L2 and the sequence given in SEQ ID NO:6 for CDR-L3 and the light chain framework region is human sub-group sequence VK2 4-1-1 A18+JK2 (SEQ ID NO:31) or a derivative thereof wherein up to five residues are changed.
5. A humanised antibody according to claim 4 wherein the residue at at least one of positions 2, 3, 45, 62, and 87 of the variable domain of the light chain, as numbered according to Kabat, is a donor residue.
6. A humanised antibody according to claim 5 having the light chain variable domain sequence given in SEQ ID NO:15.
7. The antibody of claim 1 having a heavy chain comprising a sequence given in SEQ ID NO:23 and a light chain comprising a sequence given in SEQ ID NO:15.
8. An agonistic antibody molecule according to any one of claims 1 , 4 , or 7 , wherein the antibody molecule is selected from the group consisting of: a complete antibody molecule having full length heavy and light chains, an Fab, Fab′, F(ab′) 2 , Fv, VH, VL and scFv fragment.
9. A humanised agonistic antibody which binds human PD-1, wherein the variable domain of the light chain comprises a sequence having at least 95% identity to a light chain variable domain comprising a sequence given in SEQ ID NO:15 and wherein the variable domain of the heavy chain comprises a sequence having at least 95% identity to a heavy chain variable domain comprising a sequence given in SEQ ID NO:23.
10. An isolated DNA sequence encoding the heavy and/or light chain(s) of an antibody according to any one of claims 1 , 4 , or 7 .
11. A cloning or expression vector comprising one or more DNA sequences according to claim 10 .
12. A cultured host cell comprising one or more cloning or expression vectors according to claim 11 .
13. A process for the production of the antibody comprising culturing the host cell of claim 12 and isolating the antibody.
14. The antibody according to claim 8 , wherein the antibody is conjugated to one or more effector molecules.
15. A pharmaceutical composition comprising an antibody according to any one of claims 1 , 4 , 7 , or 14 in combination with one or more of a pharmaceutically acceptable excipient, diluent or carrier.
16. A pharmaceutical composition according to claim 15 , additionally comprising other active ingredients.
17. The pharmaceutical composition according to claim 16 , wherein the active ingredients are selected from the group consisting of: an antibody, anti-TNF, anti-IL-1β, anti-T cell, anti-IFNγ, anti-LPS, a xanthine, a corticosteroid, fluticasone propionate, a beta-2-agonist, salbutamol, salmeterol, formoterol, an inhibitor of cell growth and proliferation, rapamycin, cyclophosphamide, methotrexate, a CD28 inhibitor and a CD40 inhibitor.